The Adesso 7 Port Usb 3.0 Hub Comes With A Power Adapter So You Never Have To Worry About Your High Power Usb Devices Not Working. The Usb 3.0 Connection Has A Fast Data Transfer Rate - Up To 5Gbps. The Power-Saving Switch Allows You To Conserve Energy When The Usb Devices Are Not In Use And The Led'S Let You Know Which Ports Are In Use. The Unit Has 7 Available Usb Ports To Enable You To Use Up To 7 Usb Devices At The Same Time. Simply Plug The Unit Into An Available Usb Port And You'Ll Be Up And Running. No Drivers Required.